Start & Prep Your VM

before we can install what's on the CD, we need to build a few requirements: sudo apt-get install -y dkms build-essential linux-headers-generic linux-headers-$(uname -r)

now we can use what's on the CD, install with: sudo /media/cdrom/VBoxLinuxAdditions.run

Because you are on Ubuntu Server, it'll crap out at the last step where it tries to install X11 dependencies - but don't worry about it - it'll still work. (Could not find the X.Org or XFree86 Window System.)

Reboot your VM at this point, then shell back in.

Mount Your Folders, Like Magic

I wanted to mount something that'd get used by nginx; so I mounted them under the www-data uid and gid (33). I also added www-data to vboxsf.